Quote Originally Posted by manmade76
the information really helped me, can you tell is there any diffrence between pop-up and pop under.
I hope this helps
Pop-up ads or popups are a form of online advertising on the World Wide Web intended to attract web traffic or capture email addresses. It works when certain web sites open a new web browser window to display advertisements. The pop-up window containing an advertisement is usually generated by JavaScript, but can be generated by other means as well.

pop-under advertisement,opens a new browser window hidden under the active window. Pop-unders do not interrupt the user immediately and are not seen until the covering window is closed, making it more difficult to determine which web site opened them.